Loosen the two captive No. 2 Phillips screws at the rear edge of
the top panel.

Slide the top cover to the rear about 0.5 inch (12.7 mm).

Remove the top cover.

Lift up and remove the cover.

Caution - If the top cover is removed before the server is powered off, the
server will immediately disable the front panel Power button and shut down. After
such an event, you must replace the top cover and use the poweron
command to power on the server. See Power On the Server.